Q390C L03903 - GB /T 1591-2008

Grade	Q390C
China ISC	L03903
Corresponding Standard	GB /T 1591-2008 High Strength Low Alloy Structural Steels
Classification	Alloy Steel
Properties	Strength Low-Temperature Toughness Weldability

Q390C Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N	Ti	V	Nb	Al ^b
Minimum Value	-	-	-	-	-	-	-	-	-	-	-	-	-	0.015
Maximum Value	0.2	0.5	1.7	0.03	0.03	0.3	0.5	0.3	0.1	0.015	0.2	0.2	0.07	-

Q390C Mechanical Properties

thickness（diameter，length of side） t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
t≤16	490~650	≥390	≥20
16<t≤40	490~650	≥370	≥20
40＜t≤63	490~650	≥350	≥19
63＜t≤80	490~650	≥330	≥19
80＜t≤100	490~650	≥330	≥19
100＜t≤150	470~620	≥310	≥18

1 Approximate Comparison Table Carbon Structural Steel and Engineering Steel

China	International Organization for Standardization	Germany		France	European Standard		Russia	Sweden	United Kingdom
GB	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
Q390C	Fe690 FeE690	St70-2	1.0070	A70 A70-2	E360 Fe690-2①	1.0070	S375	1655-00 1655-01	E360

2 Approximate Comparison Table High-Quality Carbon Structural Steel

China	United States	International Organization for Standardization	Germany		France	European Standard		Russia	Sweden	United Kingdom
GB	ASTM	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
Q390C	Gr.65	Fe590	E355 St52 St52-3	1.0060	E335 ES355 TS-47a TU526	E355	1.0580	St6sp	1650	CEW5 CFS5 E335 ERW5NKM ERW5NZF

Q390C Corresponding Standards(Same grade name, different standards)

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